this is the 10:00 on ktvu channel 2. >>> a bystander shot and kill in broad daylight at' bart station. now police are looking for up to seven suspects involved inn apparent gunbattle at busy train station. good evening, i'm ken wayne. >> hello everyone i'm heather holmes. >> desperate to track down the numerous people involve, bart released more deals about today's deadly shooting at the bay fair station in san leandro. during a news conference officials reveal in a teenager is in custody and that that shooting stemmed from a feud between two groups. ktvu's jade hernandez is live in san leandro, where she talked to several witnesses about the chaotic scene. >> reporter: we do know that a 16-year-old teenage boy has been arrested and investigators say two groups with each three to four people met here, argued and then a shootout erupted. police say an innocent bystander died. this taxi driver intelligent up safe giving us his name, but described for us what he heard moments after shots rang out at the bay fair bart station. >> boom, boom, boom, boom, and then i said that is shootings.